具有空隙增强无水质质子导电性的内置凝共价有机框架膜
Jin Zhang1,2, Han Zhang1, Ya-Ru Kong1
1State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China.
Journal of the American Chemical Society
|April 28, 2025
概括
研究人员开发了用于高温燃料电池的新型共价有机框架 (COF) 凝膜. 这些独立的无水质质子交换膜 (APEM) 在无水条件下表现出卓越的导电性和功率密度.
科学领域:
- 材料科学
- 电化学
- 化学工程
背景情况:
- 高性能无水质质交换膜 (APEM) 对于电化学应用至关重要,但其开发具有挑战性.
- 由于其可调节的结构,共价有机框架 (COF) 对APEM有希望,但将其加工成可用的膜是困难的.
研究的目的:
- 开发一种用于制造高温质子交换膜燃料电池 (HT-PEMFCs) 的基于COF的独立APEM的新战略.
- 克服用于实际APEM应用的COF粉末的加工限制.
主要方法:
- 使用一种新的含酸和凝的方法来制造COF凝膜.
- 在膜结构中,COF充当凝剂和质子陷.
- 在COF凝中形成了质子空缺,增强了质子迁移.
主要成果:
- 在高于140°C的温度下,COF凝膜显著增强了质子导电性,超过0.1 S cm−1.
- 在无水条件下,使用COF凝的膜电极组件在180°C达到最大功率密度为150mW cm−2.
- 开发的膜性能优于之前报告的大部分COF材料.
结论:
- 这项研究提出了制造基于COF的独立APEM的创新方法.
- 开发的COF凝膜代表了APEM在燃料电池技术中的重大进步,特别是对于HT-PEMFC.
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